201001221001992 has 32 divisors (see below), whose sum is σ = 502568989591680. Its totient is φ = 66991615389120.

The previous prime is 201001221001943. The next prime is 201001221002003. The reversal of 201001221001992 is 299100122100102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549289008 + ... + 549654815.

It is an arithmetic number, because the mean of its divisors is an integer number (15705280924740).

Almost surely, 2^{201001221001992} is an apocalyptic number.

It is an amenable number.

201001221001992 is an abundant number, since it is smaller than the sum of its proper divisors (301567768589688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201001221001992 is a wasteful number, since it uses less digits than its factorization.

201001221001992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098951453 (or 1098951449 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 201001221001992 in words is "two hundred one trillion, one billion, two hundred twenty-one million, one thousand, nine hundred ninety-two".